Sewing machine



FIG. 1 is a perspective view of the front, top and right side of a sewing machine showing my new design;

FIG. 2 is a perspective view of the rear, top and left side thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines shown are included for the purpose of illustrating the unclaimed portions of sewing machine and form no part of the claimed design. 

CLAIM The ornamental design for a sewing machine, as shown and described. 